Sarmidi Sarmidi, Yulius Mases, and Age Palogan Kesuma. 2023. “Analisis Efisiensi Jam Kerja Excavator CAT 345 GC Di Area Penambangan Pit E Banko Barat PT. Rifansi Dwi Putra”. Jurnal Ilmiah Teknik Dan Sains 1 (1):11-18. https://doi.org/10.62278/jits.v1i1.3.